You have not mentioned what where you trying to do when you got this error message. Normally this error is related to backup and system restore. Check whether Volume Shadow Copy Service, System Restore Service is started and Set to Automatic

1. Type Services.msc in Start Menu search box, hit Enter.
2. Make sure that the Volume Shadow Copy Service is running and set on Automatic.
3. If the Status of System Restore Service is not Started, Start it. Also set it on Automatic if it is not.
4. Restart your computer.